/**
* File Name: wrap.c
* Auther: Jichang
* Environment: Fedora 7 server
* check error in this direction.
*/
#include<stdio.h>
#include<stdlib.h>
#include<unistd.h>
#include<string.h>
#include<sys/socket.h>
#include<errno.h>

void perr_exit(const char *s)
{
	perror(s);
	exit(-1);
}

int Accept(int fd, struct sockaddr *sa, socklen_t *salenptr)
{
	int n;
again:
	if((n = accept(fd, sa, salenptr)) < 0) {
		if((errno == ECONNABORTED) || (errno == EINTR)) {
			goto again;
		} else {
			perr_exit("accept error");
		}
	}
	return n;
}

int Bind(int fd, const struct sockaddr *sa, socklen_t salen)
{
	int n;
	if((n = bind(fd, sa, salenptr)) < 0) {
		perr_exit("bind error");
	}
	return n;
}

int Connect(int fd, const struct sockaddr *sa, socklen_t salen)
{
	int n;
	if((n = connect(fd, sa, salen)) < 0) {
		perr_exit("connect error");
	}
	return n;
}

int Listen(int fd, int backlog)
{
	int n;
	if((n = listen(fd, backlog)) < 0) {
		perr_exit("listen error");
	}
	return n;
	
}

int Socket(int family, int type, int protocol)
{
	int n;
	if((n = socket(family, type, protocol)) < 0) {
		perr_exit("socket error");
	}
	return n;
	
}

ssize_t Read(int fd, void *ptr, size_t nbytes)
{
	ssize_t n;
again:
	if((n = read(fd, ptr, nbytes)) == -1) {
		if(errno == EINTR) {
			goto again;
		} else {
			return -1;
		}
	}
	return n;
}

ssize_t Write(int fd, const void *ptr, size_t nbytes)
{
	ssize_t n;
again:
	if((n = write(fd, ptr, nbytes)) == -1) {
		if(errno == EINTR) {
			goto again;
		} else {
			return -1;
		}
	}
	return n;
}

int Close(int fd)
{
	int n;
	if((n = close(fd)) == -1) {
		perr_exit("close error");
	}
	return n;
}

ssize_t Readn(int fd, void *vptr, size_t n)
{
	size_t nleft;   // unsigned in, the rest bytes
	ssize_t nread;  // int read in byte 
	char *ptr;

	ptr = vptr;
	nleft = *ptr;
	
}

ssize_t Writen(int fd, const void *vptr, size_t n)
{
	
}

ssize_t my_read(int fd, char *ptr)
{
	int n;
again:
	if((n = accept(fd, sa, salenptr)) < 0) {
		if((errno == ECONNABORTED) || (errno == EINTR)) {
			goto again;
		} else {
			perr_exit("accept error");
		}
	}
	return n;
	
}

ssize_t Readline(int fd, void *vptr, size_t maxlen)
{
	int n;
again:
	if((n = accept(fd, sa, salenptr)) < 0) {
		if((errno == ECONNABORTED) || (errno == EINTR)) {
			goto again;
		} else {
			perr_exit("accept error");
		}
	}
	return n;
}

int main(int argc, char *argv[])
{
	
	return 0;
}

